source: rtems/cpukit/libcsupport/include/rtems/libio.h @ dcec5a4

4.104.114.84.95
Last change on this file since dcec5a4 was dcec5a4, checked in by Joel Sherrill <joel.sherrill@…>, on Jan 29, 1997 at 12:29:25 AM

Merged newlib's libgloss support for rtems into this directory. This
should simplify the build process.

  • Property mode set to 100644
File size: 2.9 KB
Line 
1/*
2 * General purpose communication channel for RTEMS to allow UNIX/POSIX
3 *    system call behavior on top of RTEMS IO devices.
4 *
5 * TODO
6 *      stat(2)
7 *      unlink(2)
8 *      rename(2)
9 *
10 *  $Id$
11 */
12
13#ifndef _RTEMS_LIBIO_H
14#define _RTEMS_LIBIO_H
15
16#include <sys/stat.h>
17
18typedef unsigned32 rtems_libio_offset_t;
19
20/*
21 * An open file data structure, indexed by 'fd'
22 * TODO:
23 *    should really have a separate per/file data structure that this
24 *    points to (eg: size, offset, driver, pathname should be in that)
25 */
26
27typedef struct {
28    rtems_driver_name_t *driver;
29    rtems_libio_offset_t size;          /* size of file */
30    rtems_libio_offset_t offset;        /* current offset into the file */
31    unsigned32           flags;
32    char                *pathname;      /* opened pathname */
33    Objects_Id           sem;
34    unsigned32           data0;         /* private to "driver" */
35    unsigned32           data1;         /* ... */
36} rtems_libio_t;
37
38
39/*
40 * param block for read/write
41 * Note: it must include 'offset' instead of using iop's offset since
42 *       we can have multiple outstanding i/o's on a device.
43 */
44
45typedef struct {
46    rtems_libio_t          *iop;
47    rtems_libio_offset_t    offset;
48    unsigned8              *buffer;
49    unsigned32              count;
50    unsigned32              flags;
51    unsigned32              bytes_moved;
52} rtems_libio_rw_args_t;
53
54/*
55 * param block for open/close
56 */
57
58typedef struct {
59    rtems_libio_t          *iop;
60    unsigned32              flags;
61    unsigned32              mode;
62} rtems_libio_open_close_args_t;
63
64/*
65 * param block for ioctl
66 */
67
68typedef struct {
69    rtems_libio_t          *iop;
70    unsigned32              command;
71    void                   *buffer;
72    unsigned32              ioctl_return;
73} rtems_libio_ioctl_args_t;
74
75
76/*
77 * Values for 'flag'
78 */
79
80#define LIBIO_FLAGS_NO_DELAY      0x0001  /* return immediately if no data */
81#define LIBIO_FLAGS_READ          0x0002  /* reading */
82#define LIBIO_FLAGS_WRITE         0x0004  /* writing */
83#define LIBIO_FLAGS_LINE_BUFFERED 0x0008  /* line buffered io (^h, ^u, etc) */
84#define LIBIO_FLAGS_OPEN          0x0100  /* device is open */
85#define LIBIO_FLAGS_APPEND        0x0200  /* all writes append */
86#define LIBIO_FLAGS_CREATE        0x0400  /* create file */
87
88#define LIBIO_FLAGS_READ_WRITE    (LIBIO_FLAGS_READ | LIBIO_FLAGS_WRITE)
89
90void rtems_libio_config(rtems_configuration_table *config, unsigned32 max_fds);
91void rtems_libio_init(void);
92
93int __rtems_open(const char  *pathname, unsigned32 flag, unsigned32 mode);
94int __rtems_close(int  fd);
95int __rtems_read(int fd, void *buffer, unsigned32 count);
96int __rtems_write(int fd, const void *buffer, unsigned32 count);
97int __rtems_ioctl(int fd, unsigned32  command, void *buffer);
98int __rtems_lseek(int fd, rtems_libio_offset_t offset, int whence);
99int __rtems_fstat(int _fd, struct stat* _sbuf);
100int __rtems_isatty(int _fd);
101
102#endif /* _RTEMS_LIBIO_H */
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